Mechanically-operated scotch hearth.



A. S.`M()SF.S` MEcHAmcALLv oPEqAED scocH HEAHTH..

MPelicmloil men APR. a. |916.

' Patented Apr. 23 1918.

, A. sf Moses. MECHANICALLY OPERATED SCOTCH HEARTH.'

APPL'cATloN nusp APR. a. 1916.

Patentd Apr.' 23, 1918 3 SHEETS-SHEET 2 y A.' SJMOSES. WI'ECHANICLLY OPERATED SCOTCH H'EARTH. I

APPLICATION FILED APR. 3. ISIS. I

y Patendl Apr. 23,1918

y 3 sMEns-SHEET a.

Il I

molten` lead in the basin and banked upA ELEIGH S. MOSES, OF NEW YORK, N. Y., ASSXGNOR TO ST. 'LOUJIS SMEL'IING AND REKENING COMPANY, OF ST. JLOUIS, MISSOUR, .h CORPORATION OF MISSOURI.

EGHEGALLY-OPERATED SCOTCH HEARTH.

Speoication of Letters Patent.

Patented dpr., 23, fOtO,

application leol April 3, 1916. aerial No. 86,629.

To all 'whom it may concern:

a citizen of the United States, and residing at New York, in the State of New York,

have invented a new and useful llmprove` ment in Mechanically Operated Scotch Hearths, of which the following is a specification.

rllhis invention relates to smelting fur naces and more particularly to smeltinglfurnaces of the Scotch hearth type whic are used for smelting lead. y

A Scotch hearth comprises a'fcomparatively deep basin of cast iron, a water back having twyers at the lower end thereof ositionedjust above the basin, an apron w ich,

extends forwardly from the basin, and a hood which extends over the hearth. lln the operation of such a furnace the basin is hlled nearly full with molten lead. The ore and fuel are then placed on top of this bed of against the water back. llf a blast is supplied to the twyers the ore will be reduced to molten lead. The workman pokes or turns over the ore and fuel (which is usually coke) banked against the water back and adds the ore and fuel in small quantities. As soon as sumcient ore has 'been reduced so that the molten lead nearly fills the basin,

the workman inserts a shovel into the basin and works it back and forth so as to cause the molten lead to run over onto the apron (which is provided with a gutter) and into the lead pot. The fumes pass through the hood and then to a bag housewhere they are collected. rlFhe operation of such a hearth not only requires a considerable amount of manual labor, but, in View of the presence and escape of the poisonous lead fumes it is diicu'lt to obtain and retain workmen.

' One ofthe obj ects of this invention, therefore, is to construct a furnace of the above type the operation of which will be auto-y matic, so as to require for its operation comparatively few workmen.

Another object is to construct a furnace which is provided with automatic means for o erating on the material on the hearth, in-

c uding the poking and leveling means,"

which will be automaticin their operation.

Furtherobjects will appear from the detail description taken in connection with the accompanying drawings, in which:

Flgure 1 1s a front elevation of a furnace embodying this invention;

Fig. 2 is an enlarged section on the line 2 2, Fig. 1;

3 is a section on the line 3 3, Fi .2;

Fig. 4 is an enlarged front elevation o the support for the poking and leveling means;

Fig. 5 is an enlarged section on the line 55', Fig. l;

Fig. 6 is a detail of the shifting means;

7 is an enlarged detail of Fig. 5; and,

Fig. 8 is a view similar to Fig. 7 but from the opposite side of the furnace.

Referring to the accompanying drawings, 1 deslgnates a base, upon which is mounted a series of brackets 2 supporting the hearth. This hearth preferably comprises a series of sections bolted together to form an elongated Scotch hearth. Each section comprisesa basin 3, which may have end walls 4, and which preferably has at each end an cverow spout 5. .A11 apron 6 is attached to er cast integral with the basin, and this apron has an overhanging portion 7 which is spaced from the front wall of the basin and extends below the spout, as shown in Figs. 5, 7 and 9, to form a slag seal. 'llhe water back may be cast integral with the basin, but, in this embodiment, is formed as a separate part. Each water back section 8 has a wind box 9 connected with twyers 10 extending through the water back. A water supply connection ism'ade to each water back by a pipe 11 discharging into risers 12, which extend nearly to the top of the water jacket in the water back. rlhe water supply risers preferably enter each section near one end, and the outlets 13 are made at the other ends, theseoutlets being connected to a main drain pipe 14. rl[`he basin sections are connected end to end by bolts 15 passing through and clamping the abuttin ends, while the water backs are connected y bolts 16 connecting the lugs on the water backs. The parts, as thus constructed, form an elongated hearth resting on and supported by the brackets 2. lt is to be understood, of course, that the hearth, instead of being made in sections, can be made one integral structure, and that the ends 4 can be omitted to form a continuous trough. A hood 17, of usual construction, extends over the hearth, and this hood ma be supported directly on the water bac s. The hood 1s provided with a series of outlets 18 discharging into a header 19, which is connected by a pipe l20 to the bag house. The spouts 5 preferably discharge into a trough 21 extending along and supported by brackets 22 from the basin, and 'this trough may have a suitable outlet spout discharging the molten metal.

Referring now more particularly to Figs. 4 and 5, 30 designates a suitable frame structure which is sup orted by Wheels 31 on a track 32, and Whlch may be balanced and partially suspended 4by Wheels 33 from overhead tracks or trolleys 34, which latter are supported by standards 35. The Wheels 31 are fixed to shafts 36, which have sprockets 37 connected by a chain 38 to a Ysprocket 39, mounted on a shaft in the frame, and having fixed thereto a gear 40 meshing with a pinion 41 on the shaft of an electric motor 42 also mounted on the base of the frame 30. Revolution of the motor shaft will cause the frame to travel along the track 32, which is parallel with the hearth, the direction of movement depending upon the direction of movement of the motor. This motor is provided with any suitable reversing means, which may be electricaly or mechanical, controlled by an arm 43 connected with a shifter rod 44, which is shifted at the ends ,of its movements by engaging lugs 45 on the standards 35. The operation is such that, when the frame or support 30 reaches the one end of the hearth, the shifter rod'44 will engage the lug 45 on that side and reverse the motor, so as to cause the frame or support to travel back. Referring now to Figs. 4, 5 and 8, there is mounted on vthe frame or support a motor 50 having a pinion 51 fixed to its shaft and meshing With a gear 52 on a shaft 53 which has a fly Wheel 54 fixed thereto. The shaft 53 has a pinion 55 meshing with a ear 56 on a shaft 57. Extending forward y over the apron 6, and fixed to the frame 30, is a bracket 58 which has svviveled thereon at 59 a block or lsleeve 60 forming a bearing for a poker 61. This poker is pivoted at 62 to a crank disk 64 on the shaft 57. With this construction,` revolution of the shaft 57 through the train of gears, and revolution of the crank disk 64, will cause the point of the poker 61 tovexecute a fouriotion movement, as clearly illustrated in i" 8.

eferring now to Figs. 4, 5 and 7, the shaft 53 has fixed thereto a' sprocket 70 connected by a chain 71 to a sprocket 72 on a shaft 74. rThis shaft 74 has fixed thereto a gear 75 meshing With a gear 76 on a shaft 7. ylhe shaft 77 has fixed thereto a crank 78 engaging the end of a link or bar 79,

which is slotted as shown at 80, the slot bcing engaged by a crank 81 on a crank disk 82 fixed to the shaft 74. The link or bar 79 has mounted thereon a leveler 83, which is in the `form of a shovel. Revolution of the cranks 78 and 81, in the direction shown, will cause the leveling device 83 to perform the movements in the path as illustrated in Fig. 7.

The operation of this furnace is as follows. The basins are nearly filled with molten lead and the ore and fuel banked on the hearth, as in the operation of the ordinary Scotch hearth. The blast and the Water are then turned on, and the motors 42 and 51 set in operation. The frame or support for the poking and leveling devices will travel back and forth along the hearth, the poking device entering the materialon the hearth as far as the molten lead, moving upwardly and back, in the manner that this poking or rabbling operation is performed by the operator. The leveler will follow up the poking device and level the material against the hearth, it being noted that the leveler is retracted on its return movement, so as not to again pull down the material. The feeding movement of the support or frame along the-hearth is regulated so that the poking and leveling devices Will perform the proper operations. At the end of each movement of the frame or support, the latter is reversed. The blast Will reduce the ore to the metallic state, and as the molten lead fills the basin, it will overflow onto the trough 21. ln practice the support 30 is moved slowly by proper gear ratio to the Wheels 31, While the poker and leveler are operated in proper coperative relation with respect to each other, and with respect to the movement of the frame, so as to obtain the best results. It is to be understood, of course, that the Walls 4, which divide the trough into sections, are so proportioned as to be below the point ofthe poker, and, of course, of the leveler entering the hearth. These end Walls simply form end connections.

It is obvious that various changes may be made in the details of construction Without departing from the spirit of this invention, and it is, therefore, to be understood that this invention is not to be limited to the specic construction shown and described.

Having thus described the invention, what is claimed is:

1. A'smelting furnace comprising a stationary hearth, a poker, a movable support for said poker, means for moving said poker into the material and the hearth, and means for moving said support.

2. A smelting furnace comprising a stationary hearth, a poker, a movable support for said poker, means for imparting a poltiaeaeat ing movement to said poker, and means for imparting a feeding movement to said support along said hearth. y

3. A smelting furnace comprising a stationary hearth, a leveler, a movable support for said leveler, means for moving said leveler adapted to bank the material on said hearth, and means for moving said support.

4. A smelting furnace comprising a stationary hearth, a leveler, a movable support for said leveler, means for imparting a leveling movement t0 said leveler t0 bank the material on said hearth, and means for im.-` parting a feeding movement to said support along said hearth.

5. A smelting furnace comprising a stationary hearth, a poker, a leveler, movable supporting means for said poker and said leveler, means for moving said poker into and said leveler over' the material on said hearth, and means vfor moving said support.

6. A smelting furnace comprising a stationary hearth, a poker, a leveler, movable supporting means for .said poker and said leveler, means for impartin poking and leveling movements respective y to said poker and said leveler, and means for imparting a feeding movement to said support along said hearth. l

7. A smelting furnace comprising a stationary elongated Scotch hearth, meanslfor operating on the material on said hearth, a movable support for said operating means, and means for moving said support.

8. A smelting furnace comprising a stationary elongated Scotch hearth, means for operating on the material on said hearth, a movable support for said operating means, means for imparting a feeding movement to said support along said hearth, and means for imparting an operating movement to said operating means.

9. A smeltmg furnace comprising a stationar; elongated Scotch hearth, poking means coperating with said hearth, and a movable support forl said poking means 10. A smelting furnace comprising a stationary elongated Scotch hearth, polmng means coperating With said hearthya Inovablesupport for said poking means, means for imparting a poking movement to saidv poking means, and means for imparting a feeding movement to said support alongsaid hearth.

s 11. A smelting furnace comprising a stationary elongated Scotch hearth, evelin means coperating with said hearth adapte to bank the material thereon, and a movable support for said leveling means. p

l2. A smelting furnacecomprisin a stationary elongated Scotch hearth, eveling means coperating with said hearth adapted to bank the material thereon, a support for said leveling means mounted for movement along said hearth, means for imparting a leveling movement to said leveling means, and means for impartinga feeding movement to said support along said hearth.

13. A smelting furnace comprising a stationary elongated Scotch hearth, pokin means and leveling means coperating t said hearth, and movable supporting means for said poking and leveling means.

14. A smelting furnace comprising a sta-Y tionary elongated Scotch hearth, 'pom'ng means and levelin means coperating Wit said hearth, mova le supporting means for said poking and leveling means, means fory imparting pokin and leveling movements respectivel to sald oking and said leveling means, an means or imparting a feedin movement to said support along said hearth.

lin testimony whereof ll ailix my si mature this 3d day of March, 1916.`

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